Astronomy:(374158) 2004 UL
| Discovery[1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 18 October 2004 |
| Designations | |
| (374158) 2004 UL | |
| 2004 UL | |
| Minor planet category | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 15.05 yr (5,498 days) |
| |{{{apsis}}}|helion}} | 2.4400 AU |
| |{{{apsis}}}|helion}} | 0.0928 AU |
| 1.2664 AU | |
| Eccentricity | 0.9267 |
| Orbital period | 1.43 yr (521 days) |
| Mean anomaly | 320.92° |
| Mean motion | 0° 41m 29.76s / day |
| Inclination | 23.785° |
| Longitude of ascending node | 39.575° |
| 149.57° | |
| Earth MOID | 0.0182 AU (7.1 LD) |
| Physical characteristics | |
| Mean diameter | |
| Rotation period | 38±2 h[5][lower-alpha 1] |
| Geometric albedo | 0.20 (assumed)[4] |
| Absolute magnitude (H) |
|
It was discovered on 18 October 2004 by the Lincoln Near-Earth Asteroid Research (LINEAR) at Lincoln Lab's ETS near Socorro, New Mexico.[2]
Orbit and classification
This Apollo asteroid orbits the Sun at a distance of 0.09–2.44 AU once every 17 months (521 days; semi-major axis of 1.27 AU). Its orbit has an outstandingly high eccentricity of 0.93 and an inclination of 24° with respect to the ecliptic.[1]
Due to its orbit, it is also a Mercury-crosser, Venus-crosser and Mars-crosser. It has an Earth minimum orbital intersection distance of 0.0182 AU (2,720,000 km), which translates into 7.1 lunar distances.[1]
Physical characteristics
2004 UL is an assumed stony S-type asteroid.[4]
In October 2014, a rotational lightcurve for this asteroid was obtained from photometric observations by American astronomer Brian Warner at the CS3–Palmer Divide Station (U82) in Landers, California.[lower-alpha 1] It gave a longer-than average rotation period of 38±2 hours (most minor planets take 2–20 hours to complete a full rotation) with a high brightness variation of 1.2 magnitude, indicating a non-spheroidal shape ({{{1}}}).[5]
Based on a generic magnitude-to-diameter conversion, 2004 UL measures between 0.5 and 1.2 kilometers.[3] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 0.516 kilometers with an absolute magnitude of 18.8.[4]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 18 October 2013 (M.P.C. 85347).[6] As of 2018, it has not been named.[2]
Notes
- ↑ 1.0 1.1 Lightcurve plot for (374158) by B. D. Warner at the CS3-Palmer Divide Station from October/November 2014
- ↑ 2.0 2.1 2.2 Jewitt (2013). Abs. magnitude of 18.77 (R). Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (374158)
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 374158 (2004 UL)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2374158;cad=1. Retrieved 1 June 2017.
- ↑ 2.0 2.1 2.2 "374158 (2004 UL)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=374158. Retrieved 18 August 2016.
- ↑ 3.0 3.1 "NEODyS (374158) 2004UL". Near Earth Objects – Dynamic Site. https://newton.spacedys.com/neodys2/index.php?pc=1.1.9&n=374158. Retrieved 2014-03-07.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 "LCDB Data for (374158)". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=374158%7C. Retrieved 18 August 2016.
- ↑ 5.0 5.1 Warner, Brian D. (April 2015). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 October-December". The Minor Planet Bulletin 42 (2): 115–127. ISSN 1052-8091. Bibcode: 2015MPBu...42..115W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42..115W. Retrieved 18 August 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 26 February 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- (374158) 2004 UL at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- (374158) 2004 UL at ESA–space situational awareness
- (374158) 2004 UL at the JPL Small-Body Database
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